[all-commits] [llvm/llvm-project] 875b3b: [Support] Add reserve() method to the raw_ostream.

[avl-llvm via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 875b3b2cdda105c01af9a1330b1cb6a3f1e1b822
      https://github.com/llvm/llvm-project/commit/875b3b2cdda105c01af9a1330b1cb6a3f1e1b822
  Author: Alexey Lapshin <a.v.lapshin at mail.ru>
  Date:   2021-02-23 (Tue, 23 Feb 2021)

  Changed paths:
    M llvm/include/llvm/Support/raw_ostream.h
    M llvm/unittests/Support/raw_ostream_test.cpp

  Log Message:
  -----------
  [Support] Add reserve() method to the raw_ostream.

If resulting size of the output stream is already known,
then the space for stream data could be preliminary
allocated in some cases. f.e. raw_string_ostream could
preallocate the space for the target string(it allows
to avoid reallocations during writing into the stream).

Differential Revision: https://reviews.llvm.org/D91693